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The 1769-L23E-QBFC1B is an all-in-one CompactLogix packaged controller featuring dual communication ports, a single Ethernet interface and an RS-232 port compatible with DF1 and ASCII protocols. To handle localized automation, the unit embeds a rich mix of I/O channels, consisting of 16 digital 24V DC inputs, 16 digital 24V DC outputs, 4 analog inputs, 2 analog outputs, and 4 high-speed counters. The entire module runs on an external 24V DC power source.
All-in-One Integration
Embedded Multi-Functional I/O
Dual Onboard Communication
1769-L23E-QBFC1B enables robust network connectivity and visualization integration with Human-Machine Interfaces (HMI) and Supervisory Control and Data Acquisition (SCADA) systems through dual onboard communication interfaces. The integrated EtherNet/IP port utilizes an RJ45 socket and standard unshielded Category 5 (Cat5) twisted-pair cabling to support half or full-duplex operation at 10/100 Mbps data rates. By layering the Common Industrial Protocol (CIP) over standard TCP/IP and UDP internet protocols, it provides fast, reliable networked connectivity across standard industrial architectures. Complementing the network port is an isolated 9-pin RS-232 serial port designed for point-to-point topologies. Supporting DF1 and ASCII protocols, this serial link operates at a maximum communication speed of 19.2 Kbps (19200 baud) and typically uses a 1756-CP3 communication cable for initial configuration and programming.
The 1769-L23E-QBFC1B is equipped with 512 KB of non-expandable user control memory executed via volatile RAM. To prevent data corruption and ensure user program retention during a main power loss, the memory circuit is backed by a replaceable 1769-BA lithium battery unit located on the right side of the chassis. To preserve the volatile memory, the battery replacement procedure must be executed strictly while the controller is powered. Initial network IP address assignment can be commissioned using the standard Rockwell BOOTP-DHCP utility or by downloading the configuration through the serial connection.
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Allen Bradley 1769-L23E-QBFC1B CompactLogix Packaged Controller Manuals, Datasheets, Drivers, Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Water & Wastewater Treatment
Controls small-to-medium pump stations, chemical dosing systems, and filter backwashing. It utilizes embedded analog I/O to monitor flow rates and adjust pump speeds via VFDs.
Food & Beverage Processing
Deployed in compact bottling lines, Clean-in-Place (CIP) systems, or ingredient blenders. It utilizes high-speed counters (HSC) for precise bottle counting on conveyors.
Packaging Machinery
Serves as the main controller for standalone wrapping, bagging, or labeling machines. Onboard digital I/O handles fast cylinder actuation while communicating with a PanelView HMI.
Pharmaceuticals & Life Sciences
Controls cleanroom environmental chambers, small powder blenders, or capsule-filling machines. Its compact design is ideal for embedding into space-restricted standalone pharmaceutical equipment.
Oil & Gas
Functions as a remote control unit (RTU) for wellhead skids, small separators, or custody transfer skids. It safely transmits field data to SCADA via RS-232 or Ethernet.
Automotive Manufacturing & Assembly
Controls conveyor diversion units, standalone leak testing benches, or dedicated part assembly workstations, integrating seamlessly into the plant's distributed network.
When operating the 1769-L23E-QBFC1B, the 1769-BA battery replacement must be performed under power to prevent data loss, whereas local expansion modules and the right-end cap are not hot-swappable and require a complete power shutdown before removal.
Additionally, all embedded analog and high-speed counter signal lines must be routed separately from high-voltage cables and incorporate single-point shield grounding at the terminal block to prevent electromagnetic interference.
The 1769-L23E-QBFC1B functions as a fully integrated, small-form-factor programmable automation controller (PAC) optimized for independent machine-level control applications. Its comprehensive hardware configuration embeds native logic execution alongside localized I/O resources, which encompass a 16-point digital input/output array, a 4-channel analog input section, a 2-channel analog output block, high-speed counter functionality, and a dedicated RS-232 serial link.
What is the configuration of the built-in I/O on the 1769-L23E-QBFC1B?
The unit features an integrated hardware setup that includes 16 discrete 24V DC inputs, 16 discrete 24V DC outputs, 4 analog inputs, 2 analog outputs, and 4 high-speed counters.
Can the memory capacity of the 1769-L23E-QBFC1B be expanded?
No, memory expansion is not supported. The hardware is built with a fixed 512 KB of user memory and does not include a flash memory expansion slot.
What type of input power does the 1769-L23E-QBFC1B require?
The module is engineered to run exclusively on a 24V DC power source.
What is the user memory capacity of the 1769-L23E-QBFC1B?
It possesses a fixed user control memory capacity of 512 KB.
Can the memory of the 1769-L23E-QBFC1B be upgraded or expanded via a slot?
No, the memory of this controller is fixed, and it does not feature an external flash memory expansion slot.
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Disclaimer: We are not an authorized distributor or distributor of the product manufacturer of this website, The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because our company is not an authorized distributor of this product, the Original Manufacturer`s warranty does not apply.While many DCS PLC products will have firmware already installed, Our company makes no representation as to whether a DSC PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. Our company also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from our company, its distributors, or any other source. Our company also makes no representations as to your right to install any such firmware on the product. Our company will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.
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